Limnofregata fossil map
Where fossils of Limnofregata have been found, shown on the Earth as it looked about 56 million years ago and on today’s map.
Dots are fossil collections recorded in the Paleobiology Database. The “then” view moves today’s fossil sites back to their positions 56 million years ago (the time slice nearest the median age of the fossils) using the Merdith et al. (2021) plate model; positions are approximate. Open on the timeline map →
| Group | Prehistoric birds |
|---|---|
| Lived | 56–48.07 million years ago (Ypresian) |
| Periods | Paleogene |
| Family | Fregatidae |
| Named by | Olson 1977 |
| Fossil records | 11 occurrences at 9 locations (PBDB) |
| Found in | United States |
| Rock formations | Green River, Wasatch, Nanjemoy |
About Limnofregata
Limnofregata ("Freshwater frigatebird") is an extinct genus of primitive frigatebird. The two known species were described after fossils from the Early Eocene Green River Formation (c. 49 million years ago) of Wyoming. A number of good complete and partial skeletons, some with feather impressions, are known of the type species, Limnofregata azygosternon, and L. hasegawai is known from two skulls and most of one torso.
Text in “About” is quoted from the Wikipedia article Limnofregata (revision 1380576779), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 23 October 2026. Ages are those of the rock layers the fossils were found in. Wikidata: Q961985.
